| This minifigure has only appeared in a non-physical form|
Although this article is about an official minifigure, it never existed in physical form, or appeared in any official LEGO sets.
Atlas was a blue eyed Core with a basic design as a typical rounded Core that was somewhat masculine. GLaDOS had created the Cooperative Testing Initiative after her awakening, as a means of replacing Chell as her only Test Subject. Along with P-Body, the two bots are pitted against a series of tests built by GLaDOS herself, utilizing the many different mechanics previously encountered by Chell.
It was later revealed by GLaDOS that Atlas and P-body's Cores were programmed specifically to do nothing more but tests.
During the final phases of testing, GLaDOS revealed that, while the Cooperative Testing Initiative has its uses, she needed human testing for science, not robots. GLaDOS revealed that there are humans locked away, deep within the ancient Aperture facilities. There the bots would be tasked with navigating the old test chambers and unlocking the massive vault containing the humans, seemingly kept in place by some form of cryogenic storage. By doing this, they 'save science.' However, almost immediately after the robots unlock the room containing the test subjects, they were destroyed. They were eventually rebuilt and probably stopped being used for tests.